The study design consists of a prospective comparison of diagnostic test findings on a consecutive case series with each subject serving as his or her own control. In order to do this, we will enroll N subjects (N=166), and will subject each of the subjects to K procedures (K=3). One of those procedures, the "traditional" one (K-1), is considered to be the gold standard for comparison. We will compare the diagnostic findings from the K-2 and K-3 alternative procedures (EBUS and EUS, respectively) with the gold standard across the N subjects. We will compare them singly and in combination with the gold standard. All patients with a new or suspected diagnosis of lung cancer will be prospectively enrolled in the study. All patients will undergo standard mediastinal staging, EBUS and EUS in the operating room, during one procedure. Patients will be included in the study if they meet one of the following criteria: (A) Lung lesion with mediastinal lymphadenopathy and/or positive PET scan in the mediastinum, (B) Lung lesion without mediastinal lymphadenopathy or positive PET scan in the mediastinum. Sample size has been calculated to be 166 patients.